KR20200020398A - Light emitting device package - Google Patents

Abstract

According to one embodiment of the present invention, provided is a light emitting element package comprising: a light emitting element emitting light having a peak wavelength in a range of 410 to 430 nm; an encapsulant disposed on the light emitting element; and a fluorescent composition disposed in the encapsulant. In a measurement spectrum of the light emitting element package, an intensity of a first wavelength region energy of 460 to 500 nm of a measurement spectrum is greater than an intensity of a solar light source energy of the first wavelength region so as to realize a light source similar to sunlight.

Description

Light emitting device package {LIGHT EMITTING DEVICE PACKAGE}

The present invention relates to a light emitting device package, and more particularly, to a light emitting device package having a spectrum similar to sunlight that helps in physiological rhythms and induces vitamin A synthesis in the body.

A light emitting device including a compound such as GaN, AlGaN, etc. has many advantages such as having a wide and easy-to-adjust band gap energy and can be used in various ways as a light emitting device, a light receiving device, and various diodes.

In particular, light emitting devices such as light emitting diodes or laser diodes using nitride semiconductor materials can realize various colors such as red, green, blue, and ultraviolet rays by developing thin film growth technology and device materials. Efficient white light can be realized by using fluorescent materials or combining colors, and has the advantages of low power consumption, semi-permanent life, fast response speed, safety and environmental friendliness compared to conventional light sources such as fluorescent and incandescent lamps.

In addition, when a light-receiving device such as a photodetector or a solar cell is manufactured by using a nitride semiconductor material, the development of device materials absorbs light in various wavelength ranges and generates a photocurrent to generate light currents. Light is available. It also has the advantages of fast response speed, safety, environmental friendliness and easy control of device materials, making it easy to use in power control or microwave circuits or communication modules.

Accordingly, the semiconductor device may replace a light emitting diode backlight, a fluorescent lamp, or an incandescent bulb that replaces a cold cathode tube (CCFL) constituting a backlight module of an optical communication means, a backlight of a liquid crystal display (LCD) display device. Applications are expanding to include white light emitting diode lighting devices, automotive headlights, traffic lights, and sensors that detect gas or fire, and applications to high frequency application circuits, other power control devices, and communication modules.

On the other hand, the human eye is located in the rods responsible for night vision, the rods contain the rhodopsin composed of retinal, a precursor of opsin and vitamin A. When the photochemical reaction occurs and the retinal absorbs light, it is separated from the opsin and releases energy. The energy released during this rhodopsin decomposition process activates the opsin and excites the rod, which stimulates the brain through the optic nerve. Is passed to establish a time (see FIG. 1).

Conventional light sources have a low luminous intensity in the 500 nm region, which is the maximum absorption wavelength of the retinal, thereby degrading rhodopsin decomposition efficiency, thereby increasing the eye fatigue of the user. In addition, even though the average value of the color rendering index (CRI), which shows a degree similar to sunlight, is low, and the average color rendering index is high, the value of the special color rendering index R9 to R15 among the color rendering index in each spectral region is low. There was a problem appearing heterogeneity.

The present invention has been proposed to solve this problem.

The technical problem to be solved by the present invention is that the emission intensity in the 500 nm region of the spectrum of the light source is similar to sunlight (natural light) can reduce eye fatigue, the average color rendering index (Ra) and in each spectral region The present invention provides a light emitting device package similar to sunlight in which individual color rendering indices R1 to R15 are all 95 or more.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A light emitting device package according to an embodiment of the present invention, a light emitting device for emitting light having a peak wavelength within the range of 410nm to 430nm light emitting device comprising an encapsulant disposed on the light emitting device and a phosphor composition disposed in the encapsulant In the measurement spectrum of the device package, the intensity of the first wavelength region energy of 460 nm to 500 nm of the measurement spectrum is greater than the intensity of the solar light source energy of the first wavelength region.

The intensity of the second wavelength region energy of 440 nm to 455 nm of the measurement spectrum may be 115% or less of the intensity of the solar light source energy of the second wavelength region.

The intensity of the third wavelength region energy of 510 nm to 545 nm of the measurement spectrum may be 95% or more of the intensity of the solar light source energy of the third wavelength region.

The energy intensity of the fourth wavelength region of 590 nm to 630 nm of the measurement spectrum may be 95% or more of the energy intensity of the solar light source of the fourth wavelength region.

The phosphor composition includes a first phosphor having an emission center wavelength of 490 nm or more and 505 nm or less, a second phosphor having an emission center wavelength of 450 nm or more and 470 nm or less, and a third phosphor having an emission center wavelength of 580 nm or more and 670 nm or less And a fourth phosphor having an emission center wavelength of 515 nm or more and 530 nm or less or a fifth phosphor having an emission center wavelength of 515 nm or more and 570 nm or less.

The first phosphor may include at least one or more of the phosphors represented by the following Chemical Formulas 1 to 3.

[Formula 1]

(Ba, Mg) _{3- a} Si _{6 - b} O _{3 .5- c} N _{8 .5-d} (Li, Cl, F, P) _{1- e} : Eu ^{2 +} _a

(Formula 1, 0 <a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)

[Formula 2]

(Ba, Mg, Ca, Sr) _{3- a} Si ₆ O ₃ N ₈ : Eu ^{2 +} _a

In Formula 2, 0 <a≤0.5

[Formula 3]

(Ba, Mg, Ca, Sr) _{1- a} Si ₂ O ₂ N ₂ : Eu ^{2 +} _a

(In Formula 3, 0 <a ≦ 0.5)

The second phosphor may include a phosphor represented by Formula 4 below.

[Formula 4]

(Sr, Ba, Ca) _{3- a} MgSi ₂ O ₈ : Eu ^{2 +} _a

In Formula 4, 0 <a≤0.5

The third phosphor may include at least one or more of the phosphors represented by the following Chemical Formulas 5 to 8.

[Formula 5]

(Ca, Sr) _{1- x} AlSiN ₃ : Eu ^{2 +} _x

(In Formula 5, 0 <x≤0.5)

[Formula 6]

Ca _{1 - x} AlSiN ₃ : Eu ^{2 +} _x

In Formula 6, 0 <x≤0.5

[Formula 7]

Sr _{2 - x} Si ₅ N ₈ : Eu ^{2 +} _x

In Formula 7, 0 <x≤0.5

[Formula 8]

(Ba, Sr) _{2- x} Si ₅ N ₈ : Eu ^{2 +} _x

In Formula 8, 0 <x≤0.5

The fourth phosphor may include a phosphor represented by Formula 9 below.

[Formula 9]

(Sr, Ba) _{2- a} MgSi ₂ O ₇ : Eu ^{2 +} _a

In Formula 9, 0 <a≤0.5

The fifth phosphor may include at least one or more of the phosphors represented by the following Chemical Formulas 10 to 12.

[Formula 10]

(Lu, Y, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x

(In Formula 10, 0 <x≤0.1)

[Formula 11]

(Y, Lu, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x

In Formula 11, 0 <x≤0.1

[Formula 12]

La _{3 - x} Si ₆ N ₁₁ : Ce ^{3 +} _x

In Formula 12, 0 <x≤0.1

1 wt% to 5 wt% of the first phosphor, 30 wt% to 40 wt% of the second phosphor, and 1 wt% to 5 wt% of the third phosphor, based on 100 wt% of the phosphor composition And 50 wt% or more and 65 wt% or less of the fourth phosphor.

10% by weight to 20% by weight of the first phosphor, 70% by weight to 85% by weight of the second phosphor, 1% by weight to 5% by weight of the third phosphor, based on 100% by weight of the phosphor composition And 4 wt% or more and 10 wt% or less of the fifth phosphor.

The phosphor composition may be included in an amount of 30 wt% to 50 wt%, based on 100 wt% of the encapsulant.

In the light emitting device package according to the exemplary embodiment of the present invention, the light emission intensity in the wavelength region of 460 nm to 500 nm is higher than that of the solar light source, thereby helping to decompose rhodopsin, thereby reducing eye fatigue.

In addition, the average color rendering index Ra and the individual color rendering index R1 to R15 in each spectral region are each 95 or more in the color temperature range of 4000K or more, thereby representing light similar to sunlight.

In addition, it is possible to reduce the eye damage and sleep disturbance caused by the light source, it is possible to provide a light emitting device package excellent in biorhythm enhancement and stabilization, mental and physical stability, skin soothing and pest control effect.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a view schematically showing the synthesis and decomposition of rhodopsin according to the photochemical reaction.
Figure 2 shows the maximum absorption wavelength of rod and cone cells.
3A and 3B are schematic cross-sectional views of a light emitting device package according to an exemplary embodiment.
4 is a view showing the emission spectrum of Comparative Example 1 compared with the emission spectrum of a solar light source.
5 is a view showing the emission spectra of Example 1 and Comparative Example 2 compared with the emission spectra of the solar light source.
6 to 10 are diagrams showing emission center wavelengths of the first to fifth phosphors, respectively.
11 and 12 are diagrams showing the emission spectra of Examples 1 and 2 compared with the emission spectra of solar light sources, respectively.
13 is a diagram showing an emission spectrum of Comparative Example 3. FIG.

Hereinafter, the details of the above-described objects and technical configurations of the present invention and the effects thereof will be more clearly understood by the following detailed description.

In the description of the present invention, terms such as first and second, which are used hereinafter, are merely identification symbols for distinguishing the same or corresponding components, and the same or corresponding components are terms such as first and second. It is not limited by.

Singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “include” or “having” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof is present on the specification and that one or more other features, numbers, or steps are present. It is to be understood that the acts, components, parts or combinations thereof may be added.

As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements, or Does not exclude additional

In the description of the present invention, each layer (film), region, pattern or structures may be "on" or "under" the substrate, each layer (film), region, pad or pattern. "Formed" includes all that are formed directly or through another layer. Criteria for the top / bottom or bottom / bottom of each layer are described with reference to the drawings.

Hereinafter, a light emitting device package according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3A is a cross-sectional view of a light emitting device package 100 according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view of a light emitting device package 200 according to another embodiment of the present invention.

3A and 3B, the light emitting device packages 100 and 200 according to the exemplary embodiment emit a body 11, a first lead frame 21, a second lead frame 23, and blue light. Including the light emitting element 25 and the encapsulant 41, the light emission intensity in the first wavelength range of 460nm to 500nm of the emission spectrum of the light emitting device packages 100 and 200 is the same Is greater than the luminous intensity.

4 is a light emission spectrum of Comparative Example 1 (LED 5630 PKG, LG Innotek), which is a conventional light source. Referring to FIG. 4, the light intensity of the conventional light source is significantly lower than that of a solar light source due to the rhodopsin. Since the decomposition reaction does not occur actively, there was a problem of increasing the eye fatigue of the user, a low color rendering index R9 to R15 value of the special color rendering index is lowered, there is a problem that it is difficult to express light similar to sunlight.

5 is a view illustrating emission spectra of Comparative Example 2 (Sunlike, Seoul Semiconductor), a light emitting device package 100 according to an embodiment of the present invention, and a solar light source, which are other conventional light sources similar to sunlight.

Referring to FIG. 5, the luminescence intensity of Comparative Example 2 in the first wavelength range of 460 nm to 500 nm appears to be relatively closer to sunlight than Comparative Example 1 shown in FIG. 4, but still to sunlight. It shows a significantly lower luminous intensity in comparison.

On the other hand, the light emitting device package according to an embodiment of the present invention (100, 200) not only the emission intensity in the visible light wavelength range of 500nm to 640nm wavelength range appears similar to the solar light source, Comparative Example 1 and comparison Unlike Example 2, the emission intensity in the first wavelength region is also similar to that of sunlight, so that light similar to sunlight can be expressed more than that of a conventional light source.

The first wavelength region includes the maximum absorption wavelength region of rod cells, and when the first wavelength region has a spectrum of intensity similar to or higher than that of sunlight, the supply of energy having a wavelength band required for rhodopsin decomposition reaction increases. The user's eyes can be reduced.

In addition, the first wavelength region is a wavelength that helps to improve and stabilize the biorhythm, the light emitting device package (100, 200) according to an embodiment of the present invention is the emission intensity in the first wavelength region is similar to the solar light source Higher levels may help improve and stabilize biorhythms.

On the other hand, the second wavelength region of 440nm to 455nm is a wavelength region that affects retinal damage, and may cause eye damage such as decreased vision, macular degeneration, and retinal disease, and disturbs biorhythms to cause sleep disorders. Wavelength range.

In the light emitting device packages 100 and 200 according to the exemplary embodiment, the energy intensity in the second wavelength region is less than or equal to 115% of the energy intensity of the solar light source, thereby reducing the problem of eye damage and sleep disturbance caused by the corresponding wavelength. You can.

In addition, the third wavelength region of 510nm to 545nm is a wavelength region that not only has an effect of calming damaged skin or sensitive skin, but also helps to stabilize the mind and body, and according to an embodiment of the present invention, the light emitting device package (100, 200) ), The energy intensity in the third wavelength region is 95% or more of the energy intensity of the solar light source, and the skin soothing and mental and physical stability effects are excellent. In addition, by improving the energy intensity of the third wavelength region, it can help the green plant growth.

The fourth wavelength region of 590 nm to 630 nm is a wavelength region avoided by pests, and the emission intensity in the fourth wavelength region of the light emitting device packages 100 and 200 according to an embodiment of the present invention is 95% of the emission intensity of the solar light source. As described above, there is an advantage of having excellent pest control effect.

Meanwhile, the light emitting device packages 100 and 200 according to an exemplary embodiment will be described with reference to FIGS. 3A and 3B.

3A and 3B, the light emitting device packages 100 and 200 according to the exemplary embodiment emit a body 11, a first lead frame 21, a second lead frame 23, and blue light. And a light emitting element 25 and an encapsulant 41.

The body 11 may include a resin-based insulating material, for example, a resin material such as polyphthalamide (PPA). In addition, the body 11 may fix the plurality of lead frames 21 and 23, and may include a cavity in which the light emitting device 25 is exposed. The cavity may have a cup shape, a concave container shape, the sides of the cavity may be perpendicular or inclined with respect to the bottom surface, and may vary in size and shape. The shape of the cavity viewed from above may be circular, polygonal, oval, or the like, or may be a curved shape. However, the present invention is not limited thereto, and a body 11 having various shapes may be used.

The first lead frame 21 and the second lead frame 23 may be disposed on the body 11. Lower portions of the first lead frame 21 and the second lead frame 23 may be exposed to the lower portion of the body 11 and may be mounted on a circuit board to receive power. The light emitting device 25 electrically connected to the first lead frame 21 and the second lead frame 23 through the connection member 27 may be disposed on the first lead frame 21.

The light emitting device 25 serves as an excitation light source of the phosphor composition 30 to emit the phosphor composition 30, and expresses the light emission intensity in the first wavelength region of the light emitting device package 100 similarly to a solar light source. In order to express the color rendering index (R1 to R15) for each spectrum region at 95 or more at a color temperature of 4000K or more, it is preferable to use blue light in a wavelength region of 410 nm or more and 430 nm or less.

In the case of using the light emitting device emitting UV instead of the light emitting device 25 emitting blue light as the light emitting device 25, due to the change of the wavelength used as the excitation light source of the phosphor, the wavelength region of the phosphor composition 30 The emission intensity is changed, and there is a problem that it is difficult to express light similar to sunlight.

In this case, the average color rendering index (Ra) at a color temperature of 4000K or more may be set to 95 or more according to the composition of the phosphor composition 30, but a specific color region of the color rendering index R1 to R15 for each spectral region, for example Since the value of the R11 or R12 region is significantly lower than 95, there is a problem in that it is difficult to express light similar to sunlight.

Therefore, as the light emitting element 25, it is preferable to use the light emitting element 25 that emits blue light in the wavelength region of 410nm or more and 430nm or less, and emits blue light in the wavelength region of 415nm or more and 425nm or less. More preferred.

The encapsulant 41 is disposed in the cavity surrounding the light emitting element 25 and includes the resin portion and the phosphor composition 30, and has a structure in which the phosphor composition 30 is dispersed in the resin portion. In this case, a thermosetting resin such as an epoxy resin or a silicone resin may be used as the resin part, and a ceramic material such as glass may be used.

In addition, the phosphor composition 30 included in the encapsulant 41 may be included in an amount of 30 wt% to 50 wt% with respect to 100 wt% of the encapsulant 41. When the phosphor composition 30 is included within this range, the phosphor composition 30 can be evenly dispersed in the encapsulant 41 without aggregation with each other, and can realize sufficient brightness.

The phosphor composition 30 includes a first phosphor 31 having a light emission center wavelength of 490 nm or more and 505 nm or less, a second phosphor 32 having a light emission center wavelength of 450 nm or more and a 470 nm or less, and a light emission center wavelength of 580 nm or more. A fourth phosphor 34 having a luminescence center wavelength of 515 nm or more and 530 nm or less, or a fifth phosphor 35 having a luminescence center wavelength of 515 nm or more and 570 nm or less. It may include.

Referring to FIG. 6, the first phosphor 31 may be a phosphor that is excited by an excitation light source and emits light in a cyan (cyan) region having an emission center wavelength of 490 nm or more and 505 nm or less. The first phosphor 31 may include at least one or more of the phosphors represented by the following Chemical Formulas 1 to 3.

[Formula 1]

(Ba, Mg) _{3- a} Si _{6 - b} O _{3 .5- c} N _{8 .5-d} (Li, Cl, F, P) _{1- e} : Eu ^{2 +} _a

(Formula 1, 0 <a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)

[Formula 2]

(Ba, Mg, Ca, Sr) _{3- a} Si ₆ O ₃ N ₈ : Eu ^{2 +} _a

In Formula 2, 0 <a≤0.5

[Formula 3]

(Ba, Mg, Ca, Sr) _{1- a} Si ₂ O ₂ N ₂ : Eu ^{2 +} _a

(In Formula 3, 0 <a ≦ 0.5)

Referring to FIG. 7, the second phosphor 32 may be a phosphor that is excited by an excitation light source and emits light in a blue region having an emission center wavelength of 450 nm or more and 470 nm or less, represented by Chemical Formula 4 below. It may include a phosphor.

[Formula 4]

(Sr, Ba, Ca) _{3- a} MgSi ₂ O ₈ : Eu ^{2 +} _a

In Formula 4, 0 <a≤0.5

Referring to FIG. 8, the third phosphor 33 may be a phosphor that is excited by an excitation light source and emits light in a red region having an emission center wavelength of 580 nm or more and 670 nm or less. It may include at least one or more of the phosphors represented by 8.

[Formula 5]

(Ca, Sr) _{1- x} AlSiN ₃ : Eu ^{2 +} _x

(In Formula 5, 0 <x≤0.5)

[Formula 6]

Ca _{1 - x} AlSiN ₃ : Eu ^{2 +} _x

In Formula 6, 0 <x≤0.5

[Formula 7]

Sr _{2 - x} Si ₅ N ₈ : Eu ^{2 +} _x

In Formula 7, 0 <x≤0.5

[Formula 8]

(Ba, Sr) _{2- x} Si ₅ N ₈ : Eu ^{2 +} _x

In Formula 8, 0 <x≤0.5

Referring to FIG. 9, the fourth phosphor 34 may be a phosphor that is excited by an excitation light source and emits light in a green region having an emission center wavelength of 515 nm or more and 530 nm or less, represented by Chemical Formula 9 below. It may include a phosphor.

[Formula 9]

(Sr, Ba) _{2- a} MgSi ₂ O ₇ : Eu ^{2 +} _a

In Formula 9, 0 <a≤0.5

Referring to FIG. 10, the fifth phosphor 35 may be a phosphor that is excited by an excitation light source and emits light in a green region having an emission center wavelength of 515 nm or more and 570 nm or less. It may include at least one or more of the phosphors represented by 12.

[Formula 10]

(Lu, Y, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x

(In Formula 10, 0 <x≤0.1)

[Formula 11]

(Y, Lu, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x

In Formula 11, 0 <x≤0.1

[Formula 12]

La _{3 - x} Si ₆ N ₁₁ : Ce ^{3 +} _x

In Formula 12, 0 <x≤0.1

The light emitting device packages 100 and 200 according to an exemplary embodiment of the present invention include the phosphor composition 30 as described above, thereby expressing light emission intensity similar to sunlight in a first wavelength region, and spectrum in a color temperature range of 4000K or higher. The color rendering index R1 to R15 of each region is 95 or more, so that light similar to sunlight can be expressed. Therefore, it is possible to significantly reduce the eye fatigue of the user, there is an advantage to protect the health, and has the effect of providing physical, psychological, and visual benefits by providing light optimized for the biorhythm.

However, when phosphors having a central wavelength similar to those of the first to fifth phosphors as the phosphor composition 30 but represented by other formulas not represented by the formulas (1) to (12), wavelength reabsorption and interference of the phosphors are The intensity of light emission in the first wavelength range is further reduced compared to sunlight, or it is difficult to express all of the values of R1 to R15 to 95 or more in the color temperature range of 4000K or more, which makes it difficult to express light similar to sunlight. .

Experimental Example 1

The combination of the phosphors contained in the phosphor composition 30 was adjusted as shown in Table 1 below to measure the color rendering index for each spectral region in the color temperature region of 5000 K, and the results are shown in Table 2. In addition, the emission spectra of Example 1, Example 2, Comparative Example 1, and Comparative Example 3 were measured and shown in FIGS. 4 and 11 to 13.

(Unit: weight%) First phosphor Second phosphor Tertiary phosphor Fourth phosphor Fifth phosphor Example 1 3 37 3 57 - Example 2 14 76 2 - 8 Comparative Example 1 - - 6 94 - Comparative Example 3 7 - 13 80 - Comparative Example 4 39 - 24 - 37 Comparative Example 5 - 42 9 49 - Comparative Example 6 - 68 13 - 19

11 and 12 show the emission spectra of Examples 1 and 2, respectively, and with reference to this, in the case of Examples 1 and 2, not only the emission intensity is similar to sunlight in the entire region, The luminescence intensity in the first wavelength region also appears to be similar to sunlight, which may help in the decomposition reaction of rhodopsin, thereby significantly reducing the fatigue of the user's eyes, and realizing a light source conducive to biorhythms. It turns out that you can.

On the other hand, referring to Figure 4 showing the emission spectrum of Comparative Example 1 and Figure 13 showing the emission spectrum of Comparative Example 3, the emission intensity in the first wavelength region of the wavelength range of these emission spectrum appears significantly lower than the sunlight It was confirmed that light emitted similar to sunlight was emitted.

division Example 1 Example 2 Comparative Example 1 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 R1 98.9 98.2 80.9 98.5 98.1 97.8 97.9 R2 99.2 97.9 86.7 98.4 98.0 96.8 97.2 R3 98.2 98.8 92.0 95.3 96.2 92.4 93.5 R4 96.8 96.9 84.0 92.9 91.0 87.8 89.1 R5 99.0 98.2 82.8 97.5 97.3 97.4 97.1 R6 98.8 97.0 83.1 97.2 98.5 98.2 98.0 R7 97.2 96.4 85.7 95.6 95.1 98.1 97.5 R8 97.4 97.2 66.7 95.1 94.9 97.7 97.2 R9 95.0 95.7 4.8 92.0 82.1 81.3 80.3 R10 98.4 96.8 70.0 67.4 86.4 84.4 86.5 R11 97.2 97.9 85.0 90.6 97.5 96.4 95.9 R12 97.4 96.0 68.4 90.1 84.2 83.2 81.0 R13 99.2 97.6 81.9 99.2 99.0 98.4 99.0 R14 99.1 99.2 95.8 97.5 97.1 97.1 98.4 R15 98.1 98.7 74.2 97.7 97.0 97.4 96.9 Ra 98.2 98.2 82.7 96.3 96.1 95.8 95.9

Table 2 shows the results of measuring the color rendering index of each spectrum region in the 5000 K color temperature range of Example 1, Example 2, Comparative Example 1, Comparative Examples 3 to 6, and referring to Table 2, In Example 1 and Example 2, the color rendering index in each region was more than 95, and it was confirmed that the light was substantially similar to sunlight.

On the other hand, in Comparative Example 1, the color rendering index in each region is generally low, and thus, it is confirmed that light is significantly different from sunlight. In Comparative Examples 3 to 6, Ra values are average values of R1 to R8. Was shown as 95 or more, the color rendering index in the special areas R9 to R12 appeared to be low, it was confirmed that compared to Comparative Example 1 is relatively similar to sunlight but still emits light different from sunlight.

On the other hand, the phosphor composition 30 of the light emitting device package 100 according to an embodiment of the present invention is the first phosphor 31, the second phosphor 32, the third phosphor 33 and the fourth phosphor 34 It includes. More specifically, 1 wt% or more and 5 wt% or less of the first phosphor 31, 30 wt% or more and 40 wt% or less of the second phosphor 32, 1 based on 100 wt% of the phosphor composition 30 in total 3 wt% or more to 5 wt% or less of the third phosphor 33 and 50 wt% or more and 65 wt% or less of the fourth phosphor 34.

The phosphor composition 30 of the light emitting device package 200 according to another embodiment of the present invention includes the first phosphor 31, the second phosphor 32, the third phosphor 33 and the fifth phosphor 35. More specifically, with respect to the total 100% by weight of the phosphor composition 30, at least 10% by weight to 20% by weight of the first phosphor 31, 70% by weight to 85% by weight of the second phosphor ( 32), 1 wt% or more to 5 wt% or less of the third phosphor 33 and 4 wt% or more to 10 wt% or less of the fifth phosphor 35.

When the phosphors included in the phosphor composition 30 of the light emitting device packages 100 and 200 according to the embodiment of the present invention are included in the above-described range, the emission intensity in the first wavelength region is equal to that in the same wavelength region. Appears similar to the light emission intensity of the light source, the color rendering index value of each spectral region is higher than 95 in the color temperature region of 4000K or more can implement a light similar to sunlight.

On the other hand, when the phosphor is included outside the above-mentioned range, the emission intensity in the first wavelength region is significantly lowered due to the wavelength reabsorption and interference of the phosphors, or some of the color rendering index values of the spectral regions in the color temperature region of 4000K or more. Since it is markedly low, since it is difficult to implement | achieve light similar to sunlight, it is preferable to be included in the composition range mentioned above.

Experimental Example 2

To prepare a light emitting device package comprising a phosphor composition 30 having a composition of Example 3, Example 4, Comparative Example 7 to Comparative Example 14 of Table 3, by measuring the color rendering index of each spectrum region in 5000K color temperature region Table 4 and Table 5.

(Unit: weight%) First phosphor Second phosphor Tertiary phosphor Fourth phosphor Example 1 3.0 37.0 3.0 57.0 Example 3 3.0 31.5 3.0 62.5 Example 4 2.5 31.5 2.5 63.5 Comparative Example 7 0.5 38.0 2.0 59.5 Comparative Example 8 5.5 34.5 4.5 55.5 Comparative Example 9 4.5 28.0 4.5 63.0 Comparative Example 10 3.0 42.0 3.0 52.0 Comparative Example 11 3.5 38.0 0.5 58.0 Comparative Example 12 4.0 36.0 7.0 53.0 Comparative Example 13 5.0 42.0 5.0 48.0 Comparative Example 14 1.5 30.0 1.5 67.0

division Example 1 Example 3 Example 4 Comparative Example 7 Comparative Example 8 Comparative Example 9 R1 98.9 96.9 98.8 96.5 97.1 97.7 R2 99.2 97.8 96.2 98.1 97.2 97.1 R3 98.2 96.7 97.1 98.1 97.5 95.8 R4 96.8 95.4 95.0 93.2 97.8 92.0 R5 99.0 95.8 95.4 98.5 98.3 96.4 R6 98.8 95.1 95.7 95.8 96.8 83.1 R7 97.2 96.8 95.5 94.8 98.5 96.1 R8 97.4 96.2 95.4 96.3 97.1 95.2 R9 95.0 96.0 95.7 95.1 96.5 94.0 R10 98.4 95.1 95.7 94.1 98.4 89.2 R11 97.2 95.5 95.3 84.2 86.5 95.6 R12 97.4 95.0 95.0 85.0 84.4 74.2 R13 99.2 98.7 97.8 96.1 96.2 98.0 R14 99.1 98.0 98.8 97.5 96.5 97.5 R15 98.1 97.2 97.2 95.4 97.1 96.9 Ra 98.2 96.3 96.1 96.4 97.5 94.2

division Comparative Example 10 Comparative Example 11 Comparative Example 12 Comparative Example 13 Comparative Example 14 R1 97.2 97.1 97.5 98.4 98.7 R2 98.0 97.0 97.5 96.5 95.4 R3 96.3 96.6 96.8 97.7 97.2 R4 84.0 90.2 93.8 83.9 96.4 R5 97.1 98.1 94.0 98.2 84.5 R6 93.9 94.0 93.9 95.9 95.4 R7 97.2 93.2 92.9 97.2 97.1 R8 97.4 96.5 89.0 95.8 94.5 R9 93.0 83.0 95.2 96.0 93.5 R10 90.7 94.4 82.1 89.5 95.2 R11 81.9 84.2 94.2 79.2 97.2 R12 95.2 94.9 93.8 93.5 83.7 R13 97.1 97.6 95.4 94.9 96.4 R14 97.7 98.1 97.1 96.5 97.1 R15 98.0 98.8 97.2 94.2 98.2 Ra 95.1 95.3 94.4 95.5 94.9

Referring to Tables 4 and 5, which describe the results of measuring the color rendering index of each spectrum region in the 5000K color temperature range of Examples 1, 3, 4, and Comparative Examples 7 to 14, In contrast, the color rendering index was higher than 95 in all regions, whereas the color rendering index was about 85 in one or more regions.

In particular, in the color rendering index measurement results of Example 1, Comparative Example 7, and Comparative Example 8, when the content of the first phosphor 31 is out of the range of 1% by weight to 5% by weight, the color rendering index of some regions is sharply lowered. Appears to be.

In addition, in the color rendering index measurement results of Examples 1, 3, Comparative Example 9 and Comparative Example 10, the color rendering index of each region is 95 when the content of the second phosphor 32 is in the range of 30 wt% to 40 wt%. It turns out that it appears above.

In addition, when the third phosphor 33 is included in the range of 1% to 5% by weight from Example 1, Comparative Example 11 and Comparative Example 12, the color rendering index of each region is expressed as 95 or more. From Example 4, Comparative Example 13, and Comparative Example 14, when the fourth phosphor 34 is included in the range of 50 wt% to 65 wt%, the color rendering index of each region is 95 or more.

Therefore, when the phosphor composition 30 includes all of the first phosphors 31 to 4, 34 wt% to 5 wt% or less of the first phosphor 31 in the entire phosphor composition 30. 30% to 40% by weight of the second phosphor 32, 1% to 5% by weight of the third phosphor 33, and 50% to 65% by weight of the fourth phosphor 34. When included as it can be seen that the degradation of the color rendering index due to wavelength interference and re-absorption between the phosphors, and can implement a light source similar to sunlight.

Experimental Example 3

A light emitting device package including the phosphor composition 30 having the composition of Examples 5 to 9 and Comparative Examples 15 to 22 of Table 6 was prepared, and the color rendering index of each spectral region was measured in the 5000 K color temperature region. And Table 8.

(Unit: weight%) First phosphor Second phosphor Tertiary phosphor Fifth phosphor Example 2 14.0 76.0 2.0 8.0 Example 5 11.8 82.5 1.5 4.2 Example 6 18.0 75.7 1.5 4.8 Example 7 18.9 71.8 2.3 7.0 Example 8 12.0 76.0 3.5 8.5 Example 9 14.6 77.0 2.6 5.8 Comparative Example 15 9.0 84.3 1.2 5.5 Comparative Example 16 21.0 64.8 4.7 9.5 Comparative Example 17 18.5 68.2 3.8 9.5 Comparative Example 18 7.9 87.0 1.0 4.1 Comparative Example 19 13.9 77.1 0.5 8.5 Comparative Example 20 11.1 74.2 6.7 8.0 Comparative Example 21 15.8 78.0 3.9 2.3 Comparative Example 22 12.2 74.5 1.8 11.5

division Example 2 Example 5 Example 6 Example 7 Example 8 Example 9 Comparative Example 15 R1 98.2 97.3 96.5 96.1 97.7 95.2 96.5 R2 97.9 96.9 97.1 96.8 97.1 97.2 97.9 R3 98.8 97.1 96.4 95.4 96.5 96.2 96.1 R4 96.9 97.6 97.9 95.0 95.4 98.2 96.8 R5 98.2 98.9 99.5 95.5 96.0 97.7 95.4 R6 97.0 96.6 95.3 96.1 95.2 98.2 96.4 R7 96.4 95.8 95.0 96.2 95.1 95.4 94.5 R8 97.2 96.5 95.2 95.2 95.1 97.6 96.1 R9 95.7 96.2 95.4 95.1 95.9 97.2 93.2 R10 96.8 95.0 95.0 95.2 95.2 98.1 98.0 R11 97.9 98.1 98.5 95.0 96.1 98.2 86.1 R12 96.0 95.5 96.5 96.2 95.1 97.2 84.1 R13 97.6 95.9 97.1 97.7 96.1 97.1 95.1 R14 99.2 97.1 95.0 97.1 97.9 98.2 97.2 R15 98.7 96.5 96.4 98.0 96.9 98.3 96.1 Ra 98.2 97.1 96.6 95.8 96.0 97.0 96.2

division Comparative Example 16 Comparative Example 17 Comparative Example 18 Comparative Example 19 Comparative Example 20 Comparative Example 21 Comparative Example 22 R1 96.7 97.2 98.1 97.4 95.2 94.9 96.2 R2 96.9 98.1 97.4 96.5 96.3 97.8 94.2 R3 94.7 94.4 97.3 97 90.4 91.2 97.2 R4 94.6 84.1 97.1 96 94.2 97.8 94.2 R5 95.7 94.2 96.5 96.3 94.9 94.2 93.9 R6 94.7 93.7 95.4 97.1 95.8 94.2 95.1 R7 93.4 93.2 95.1 96.1 95.4 95.2 94.2 R8 94.7 93.7 97.1 97.2 96.2 96.7 97.1 R9 97.0 96.5 84.1 95.1 96.1 97.2 96.1 R10 98.2 94.1 94.2 84.2 83.5 96.1 97.2 R11 85.2 83.9 92.1 94.4 92.1 84.5 82.4 R12 83.2 94.9 93.4 95.2 97.7 97.2 98.2 R13 94.1 98.2 97.2 96.6 97.8 97.1 97.9 R14 97.1 97.9 96.9 97.1 99.1 97.2 99.2 R15 96.5 99 97.7 97.5 99.2 98.2 99.3 Ra 95.2 93.6 96.8 96.7 94.8 95.3 95.3

Referring to Tables 7 and 8, which describe the results of measuring the color rendering index of each spectrum region in the 5000 K color temperature region of Examples 2, 5 to 9 and Comparative Examples 15 to 22, In contrast, the color rendering index was higher than 95 in all areas, whereas in the comparative examples, the color rendering index was about 85 in one or more areas.

Referring to Example 5, Example 6, Comparative Example 15, and Comparative Example 16, it can be seen that when the content of the first phosphor 31 is more than 10% to 20% by weight, some color rendering indexes are low around 85. .

In addition, referring to Example 5, Example 7, Comparative Example 17 and Comparative Example 18, when the content of the second phosphor 32 is included in the range of 70% by weight to 85% by weight, all the color rendering index of each region is 95 or more It can be seen that.

In addition, referring to Example 6, Example 8, Comparative Example 19 and Comparative Example 20, when the third phosphor 33 is included in the range of 1% by weight to 5% by weight, the color rendering index of each region is 95 or more. In Example 8, Example 9, Comparative Example 21 and Comparative Example 22, when the fifth phosphor 35 is included in the range of 4% by weight to 10% by weight, the color rendering index of each region is all 95 or more You can see that appears.

Therefore, when the phosphor composition 30 includes both the first phosphors 31 to the third phosphors 33 and the fifth phosphors 35, the first phosphors 31 in the entire phosphor composition 30 are thus included. 10 wt% to 20 wt% or less, 70 wt% or more to 85 wt% or less of the second phosphor 32, 1 wt% to 5 wt% or less of the third phosphor 33, and 4 wt% of the fourth phosphor 34 When included in the range of more than 10% by weight or less, it can be seen that a light source similar to sunlight can be realized without lowering the color rendering index due to wavelength interference and reabsorption between phosphors.

Meanwhile, a plurality of light emitting device packages 100 and 200 according to the present invention described above may be arranged on a substrate, and a light guide plate, a prism sheet, which is an optical member on an optical path of the light emitting device packages 100 and 200. Diffusion sheet or the like may be disposed.

In addition, it may be implemented as a light source device including the light emitting device package (100, 200) according to the present invention.

In addition, the light source device is a light source module including a substrate and the light emitting device package (100, 200) according to the present invention, a radiator for dissipating heat of the light source module, and by processing or converting an electrical signal provided from the outside to the light source module It may include a power supply for providing. For example, the light source device may include a lamp, a head lamp, or a street lamp. In addition, the light source device according to the embodiment may be variously applied to a product requiring light to be output.

In addition, the light source device includes a bottom cover, a reflector disposed on the bottom cover, a light emitting module emitting light and including a semiconductor element, a light guide plate disposed in front of the reflector and guiding light emitted from the light emitting module to the front; An optical sheet including prism sheets disposed in front of the light guide plate, a display panel disposed in front of the optical sheet, an image signal output circuit connected to the display panel and supplying an image signal to the display panel, and disposed in front of the display panel It may include a color filter. The bottom cover, the reflector, the light emitting module, the light guide plate, and the optical sheet may form a backlight unit.

As another example of the light source device, the head lamp may include a light emitting module including a light emitting device package disposed on a substrate, a reflector reflecting light emitted from the light emitting module in a predetermined direction, for example, a front reflector. It may include a lens for refracting the light forward, and a shade for blocking or reflecting a portion of the light reflected by the reflector toward the lens to achieve a light distribution pattern desired by the designer.

One embodiment of the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope of the technical spirit of the embodiment It will be apparent to those of ordinary skill in the art to which an embodiment belongs.

100, 200: light emitting device package
11: body
21: first lead frame
23: second lead frame
25: light emitting element
27: connecting member
30: phosphor composition
31: first phosphor
32: second phosphor
33: third phosphor
34: fourth phosphor
35: fifth phosphor
41: Encapsulant

Claims (13)

A light emitting device emitting light having a peak wavelength within a range of 410 nm to 430 nm;
An encapsulant disposed on the light emitting device; And
A phosphor composition disposed in the encapsulant;
In the measurement spectrum of the light emitting device package comprising:
The light emitting device package of claim 1, wherein the intensity of the first wavelength region energy of 460 nm to 500 nm of the measurement spectrum is greater than that of the solar light source energy of the first wavelength region. According to claim 1,
The light emitting device package of claim 2, wherein the intensity of the second wavelength region energy of 440 nm to 455 nm of the measurement spectrum is 115% or less of the energy intensity of the solar light source of the second wavelength region. The method of claim 2,
The intensity of the third wavelength region energy of 510nm to 545nm of the measurement spectrum, the light emitting device package of 95% or more of the intensity of the solar light source energy of the third wavelength region. The method of claim 3,
The light emitting device package of claim 4, wherein the intensity of the energy of the fourth wavelength region of 590nm to 630nm of the measurement spectrum is 95% or more of the energy intensity of the solar light source of the fourth wavelength region. The method of claim 1,
The phosphor composition,
A first phosphor having a light emission central wavelength of 490 nm or more and 505 nm or less;
A second phosphor having a light emission central wavelength of 450 nm or more and 470 nm or less; And
A third phosphor having a light emission central wavelength of 580 nm or more and 670 nm or less;
Including,
A fourth phosphor having a light emission central wavelength of 515 nm or more and 530 nm or less; Or a fifth phosphor having an emission center wavelength of 515 nm or more and 570 nm or less;
Further comprising a light emitting device package. The method of claim 5,
The first phosphor comprises at least one or more of the phosphors represented by the following formula (1) to (3), a light emitting device package.
[Formula 1]
(Ba, Mg) _{3- a} Si _{6 - b} O _{3 .5- c} N _{8 .5-d} (Li, Cl, F, P) _{1- e} : Eu ^{2 +} _a
(Formula 1, 0 <a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)
[Formula 2]
(Ba, Mg, Ca, Sr) _{3- a} Si ₆ O ₃ N ₈ : Eu ^{2 +} _a
In Formula 2, 0 <a≤0.5
[Formula 3]
(Ba, Mg, Ca, Sr) _{1- a} Si ₂ O ₂ N ₂ : Eu ^{2 +} _a
(In Formula 3, 0 <a ≦ 0.5) The method of claim 5,
The second phosphor comprises a phosphor represented by the following formula (4), a light emitting device package.
[Formula 4]
(Sr, Ba, Ca) _{3- a} MgSi ₂ O ₈ : Eu ^{2 +} _a
In Formula 4, 0 <a≤0.5 The method of claim 5,
The third phosphor includes at least one or more of the phosphors represented by the following formula (5) to (8), a light emitting device package.
[Formula 5]
(Ca, Sr) _{1- x} AlSiN ₃ : Eu ^{2 +} _x
(In Formula 5, 0 <x≤0.5)
[Formula 6]
Ca _{1 - x} AlSiN ₃ : Eu ^{2 +} _x
In Formula 6, 0 <x≤0.5
[Formula 7]
Sr _{2 - x} Si ₅ N ₈ : Eu ^{2 +} _x
In Formula 7, 0 <x≤0.5
[Formula 8]
(Ba, Sr) _{2- x} Si ₅ N ₈ : Eu ^{2 +} _x
In Formula 8, 0 <x≤0.5 The method of claim 5,
The fourth phosphor comprises a phosphor represented by the following formula (9), a light emitting device package.
[Formula 9]
(Sr, Ba) _{2- a} MgSi ₂ O ₇ : Eu ^{2 +} _a
In Formula 9, 0 <a≤0.5 The method of claim 5,
The fifth phosphor includes at least one or more of the phosphors represented by the following Chemical Formulas 10 to 12, the light emitting device package.
[Formula 10]
(Lu, Y, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x
(In Formula 10, 0 <x≤0.1)
[Formula 11]
(Y, Lu, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ : Ce ^{3 +} _x
In Formula 11, 0 <x≤0.1
[Formula 12]
La _{3 - x} Si ₆ N ₁₁ : Ce ^{3 +} _x
In Formula 12, 0 <x≤0.1 The method of claim 5,
1% by weight to 5% by weight of the first phosphor, 30% by weight to 40% by weight of the second phosphor, 1% by weight to 5% by weight of the third phosphor, and 100% by weight of the total phosphor composition, and A light emitting device package comprising a fourth phosphor of 50% by weight or more and 65% by weight or less. The method of claim 5,
At least 10% to 20% by weight of the first phosphor, at least 70% to 85% by weight of the second phosphor, at least 1% to 5% by weight of the third phosphor, based on 100% by weight of the phosphor composition; and 4 wt% or more to 10 wt% or less of the fifth phosphor, the light emitting device package. The method of claim 1,
The phosphor composition is 30 to 50% by weight or less based on 100% by weight of the total encapsulant, a light emitting device package.

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